Adjustable light support for reflectors



Feb. 7,1928. I 1,658,551

| BLACKMORE ADJUSTABLE LIGHT SUPPORT FOR REFLECTORS 2 Sheets-Sheet l 3 "New $01,

ADJUSTABLE LIGHT SUPPORT FOR REFLECTORS Filed July 27, 1925 2 Sheets-Sheet 2 1i and W k c all i.

Application filed July 27. 1925.

In the present day automobile headlight, consisting essentially of a light source and a reflector, it is necessary to provide an adjust i11 means which willpermit considerable variation in the position of the light source in the reflector so to secure the desired distribution of the reflected light. ihis is because the parts of the lamp and easing); not nair ctured with suliicien" eccu,i...cy nor are the filaments positioned i the bulb sufficient precision to PQTl-Tllt oi the latter beina tired in position in the lam The adjusting means which 1', have doe vised, affords the required ilQljUS'rIllElllS and at the same time holds the light source so securely inits adjusted position that it will not become loosened as a result of vibration of the car. It is also of very simple but sturdy construction and may be cheaply manufactured and easily assembled.

Un the drawing: A

Figure 1 is a partial sectional view showin one embodiment ot' my invention;

Figure 2 is view on line 22 of Figure 1 with the light bulb removed;

Figure 3 is a sectional vicw corresponding; to Figure 1 showing a modified form;

Figure l is a. section on line 4-l of ure 3; and

Figure 5 is a view partly in section showing a further modification.

In the form shown in Figures 1 and 2, 2 indicates the lamp housing and 4 the re fiector secured therein in any desired manner. The reflector 4 is provided at its apex with a slot 6 which may be elongated as shown in Figure 2. Within this slot the light soured such as an incandescent bulb 8. is adapted to be adjnstably positioned. The bulb 8 is supported in the socket 10 in any preferred manner. The socket is supported for adjustment in several directions, in this case axially and laterally, by means of a member 12 and cooperating; adjusting devices. Thus one extremity oi? the member 12 is preferably provided with an angled portion 14: having an aperture there in through which projects an adjusting screw 16 which passes through the real" isill of the casing. A nut l8-is threaded upon the adjusting screw and is preferably held against rotation by contact with a portion of the member 12 whereby upon rotation of thescrew 16 the nut 18 rides in or out upon the screw carrying with it on its out:

l t58,55l

.iEl REFLEUTORS.

Serial No. 46364.

ward movement the member 12 together with socket. l0 and bulb 8 to effect axial adjustment. Spring 20, which encircles the screw 16, causes the angled portion i l of the member 12 to constantly bear against the nut 18, followingit when it is moved inwardly. The spring); 20 alsd acts to draw the head of the screw 16 and the cooperatwasher 22 against the rear wall of the casing 2, thus serving to hold the screw in adjusted position.

The other extremity of the member 12 is provided with a similar adjusting device consisting of an angled portion 24 on the member 12 and screw 26 provided with w her 28, :iprinp; t0, and nut 32 operating, in the same manner the similar parts previously described.

In order to seal the reflector against 'the entrance of dirt l have preferably provided the washer M which encircles the socket l0 hearin): againstthe rear oi the reflector i and coverino; the opening 6 therein. Elpring 36. which should i relatively weak, bears at one end against the: washer 34- and at the other end flPfllllSt suitable abutments on the socket. as shown for vieldine'lv ho ding the washer in seating engagement. These parts also serve to hold the socket against movement.

it will now be seen that by adjustment oi the screw 16 the licht ourcemav he m ved inwardly or outwardly in an axial direction. Movement oi the light source with the construction shown on the drawing will be one of rotation about the point of connection of the member 12 with the adjustiu screw 26. And, similarly when the screw 26 is adjusted the motion of the light source will be one of rotation about the connection of the member 12 with the screw 16. However, it it is desired in either or both cases that the lightsource be capable of a pure motion of translation it is merely necessary to substitute slots for the close fitting; aperturesin the casing walls and in the angled portions 14 and 24.

a In the modification shown in Figures 3 and l, the socket 10 is directly supported by an angled member 40 which in turn is adjustably supported upon a member 42, the member as having an up-turned headed end e l as best shown in Figure 4 for easement in a slot 4 6 provided in the main;

thereon passes through an enlarged opening in the rear wall of-the' casing and through alined openin s in the members 42 and 40, the opening 111 the latter member preferably beingthreadcd. A spring 52 encircles the screw 481 and is interposed between the members a0 and 42. The other extremity of the member 42 is provided with an angled portion 54 with which cooperates a screw 56 having spring 58 and nut 60 thereon, these parts functioning the same as cor responding partsin Figure 1.

In this form of my device it will be apparent-that rotation ofthe adjusting screw 48 Will efi'ect axial adjustment of the light source while,adjustment of the screw 56 willeflfect lateral adjustment thereof. It will be noted that the two adjustments are independent of each other, that is, adjusting F the light source axially will not efiect the thescrews and not the other the angle mem- 7 ber 60 may rock slightly about its point of engagement with the other scren thus imparting a slight rocking movement to the light source. If preferred, screws 62 may pass loosely through aperturesin the member 60 and may be provided with nuts held against rotation in any suitable manner as by engagement With bent up lugs on the member 60. In this case each adjusting device is functionally the same as the adjusting devices of Figure 1 and the loose enga ement between the member 60 and the ad1usting screws prevents binding. It is also obvious that by adjusting both screws the light source may be given a pure axial movement.

I claim:

1. The combination of a lamp casing, a reflector in the casing, a source of light an angled member rigidly supporting the light source and having one arm extending substantially axially and the other arm extending substantially radially, means associated with the first-named arm for adjusting the light source in a general axial direction and means associated with the second named arm for adjusting the light source in a direction approximately transverse of its axis, said means being accessible from the outside of the casing.

2. In the combination as defined in claim 1, said first named means including a part extending through the rear of the casing, and said second named means including a part extending through the side of the casing.

3. In the combination as defined in claim 1, said means eooperatingwith the ends of said arms.

l. The combination of alamp casing, a reflector in the casing, an angled member Within the casing comprising a plurality of arms arranged at an angle, said angled member having a light bulb mounted thereon adjacent the apex of the angle independent adjusting devicessecured to the ends of the arms and accessible from the outside of the casing, vvhereby when one of said devices is manipulated the angled member is tilted about its connection with the other member.

In testimony whereof I alfix my signa ture.

LLOYD BLACKMORE. 

